Color image sensing apparatus with means for alternately extracting first and second color difference signals including a first-in first-out digital line memory
US4847684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Jun 11, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/136
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color image sensing apparatus includes a solid-state image sensing element having a color separation filter, a circuit for extracting a color difference signal from an output of the solid-state image sensing element, first and second color difference signals which are alternately extracted for every scanning line, and a delay-type line memory for storing an output signal from the color difference signal extraction circuit and for reading out a stored signal after one horizontal scanning period. The line memory is a first-in first-out type digital memory having a delay time corresponding to one horizontal scanning period. A circuit is provided for outputting the first and second color difference signals for every one horizontal scanning line, based on the output signal from the color difference signal extraction circuit and the output signal from the line memory. In this manner, the first and second color difference signals can be output not alternately, but simultaneously for every one horizontal scanning line. The delay time of the line memory is varied in accordance with the number of pixels in the solid-state image sensing element. Frame memories can be used to store the outpu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.